package servlet;

import pojo.User;
import service.impl.UserServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
//注解
@WebServlet(urlPatterns = "/user")
public class UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // TODO
        req.setCharacterEncoding("UTF-8");
        UserServiceImpl userService = new UserServiceImpl();
        String action = req.getParameter("action");

        if ("user".equals(action)){
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            User condition = new User(name,pass);
            List<User> users = userService.findAll(condition);

            //把数据放在请求域中
            req.setAttribute("users", users);
            req.setAttribute("condition", condition);
            //在那个页面显示数据
            req.getRequestDispatcher("/user.jsp").forward(req, resp);

        }else if ("delete".equals(action)){



            //获取参数
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            int result = userService.deleteUserById(id);
            if(result>0){

                req.getRequestDispatcher("user?action=user").forward(req, resp);

            }else {
                System.out.println("error");
            }
        }else if ("add".equals(action)){
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            int result = userService.addUser(new User(name,pass));
            if(result>0){
                resp.sendRedirect("user?action=user");
            }else {
                System.out.println("error");
            }


    }else if ("toupdate".equals(action)){
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            User user = userService.findUserById(id);
            req.setAttribute("user", user);
            req.getRequestDispatcher("/updateUser.jsp").forward(req, resp);

        }else if ("update".equals(action)){
            // 获取页面隐藏的id
            String sid = req.getParameter("id");
            Integer id = Integer.parseInt(sid);
            // 拿到网页传递过来的用户名和密码
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            int result = userService.updateUser(new User(id,name,pass));
            if(result>0){
                resp.sendRedirect("user?action=user");
            }else {
                System.out.println("error");
            }


        }
}}
